Re: "very security conscious"
Was thinking along the same lines but giving him the benefit of the doubt. Surely that is not his primary email account.
You can't use Google Webmaster Tools and some of their other services without a Google account. So we are pretty much forced to have a Gmail account. Putting anything else into it of importance is lazy, but there is no real choice in the matter if you use their services for yourself or on behalf of your clients.